The inflammatory pseudotumor is non nepolastic pulmonary mass lesion of unknown
etiology composed of a variety of inflammatory and mesenchymal cells, including plasma
cells, histiocytes, mast cells, lymphocytes and spindle shaped mesenchymal cells.
These different types of cells occur in varing unmbers in different areas of the same
lesion, and this variability of appearence has given rise to the large numbers, such as
plasma cell granuloma, pseudotumor, histiocytoma, xanthoma, fibroxanthoma, solitary
mast cell granuloma etc. The author report two cases of inflammatory pseudotumor with
the brief review of references.
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